That fueled three separate skirmishes early on in full-team drills. The first came between the 49ers offense and Broncos defense following safety Justin Simmons’ interception of Brian Hoyer in a red zone drill.

It bounced off Jeremy Kerley’s hands, and Simmons had a clear path to the end zone for the would-be 100-yard return. Behind the play, it appeared a Broncos defensive back blocked veteran receiver Pierre Garçon, who took exception, and a giant dog pile broke out in front of Denver’s defensive sideline.

Moments later, on the far side of the field where San Francisco’s defense was going against the Broncos’ offense, rookie pass rusher Pita Taumoepenu was involved in a scuffle with an offensive lineman.